/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */
package org.hisp.dhis.parser.expression.function;

import java.util.List;
import org.apache.commons.lang3.ArrayUtils;

/**
 * Aggregates a vector of double[] values (primative array)
 *
 * @author Jim Grace
 */
public abstract class VectorFunctionDoubleArray extends VectorFunction<Double> {
  protected VectorFunctionDoubleArray() {
    super(Double.class);
  }

  @Override
  public final Object aggregate(List<Double> values, List<Double> args) {
    return aggregate(ArrayUtils.toPrimitive(values.toArray(new Double[0])));
  }

  /**
   * Aggregates the values, using arguments (if any)
   *
   * @param values the values to aggregate.
   * @return the aggregated value.
   */
  public abstract Object aggregate(double[] values);
}
